before starting humira, your doctor should test you for tb. ask your doctor if you live in or have been to a region where certain fungal infections are common. tell your doctor if you have had tb, hepatitis b, are prone to infections or have symptoms such as fever, fatigue, cough, or sores. you should not start humira if you have any kind of infection. ask your rheumatologist about humira, to help relieve pain and stop further joint damage before they stop you. >> logan: the war in afghanistan is now the longest war in american history. 11 years after 9/11, the enemy the u.s. went there to defeat is coming back, according to the two men who know more about this than anyone-- u.s. general john allen and afghan president hamid karzai. we interviewed both of them, and they were blunt about where the war stands and about an enemy tactic that's killing more and more americans. we arrived in the afghan capital just after four u.s. soldiers were gunned down by an afghan policeman who was with them in a firefight. it's what the u.s. military calls an